WiFi

Are you having difficulties connecting to your WiFi network - or are you connected to WiFi (the icon shows a good WiFi signal) but have difficulties connecting to the internet? These are two different issues.

If your issue is actually connecting to WiFi:

If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network - Apple Support

You may also need to check your Router’s WiFi settings:

Recommended settings for Wi-Fi routers and access points - Apple Support

If you can connect to WiFi, but cannot connect to the internet, the problem is unlikely to be WiFi per-se, but more likely a problem obtaining a valid IP Address for your iPad from your WiFi network.

If you have a VPN App or profiles installed, or a security App such as Norton, these may be interfering with DHCP - and may need to be temporarily disabled.

DHCP is frequently used to automatically obtain an IP Address from your WiFi Router. Until your iPad has a valid IP Address to connect to your network, you will not have an internet connection. Disabling or removing VPN and/or the offending security App should allow DHCP to operate normally - allowing connection to your network and the internet.

If this resolves your issue, the VPN and/or security App can be reinstated after the connectivity problem has been resolved.